package com.konoha.aspect;


import com.alibaba.fastjson.JSON;
import com.konoha.annotation.SystemLog;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

@Component
@Aspect
@Slf4j
public class LogAspect {

    @Pointcut("@annotation(com.konoha.annotation.SystemLog)")
    public void pt() {

    }

    @Around("pt()")
    public Object printLog(ProceedingJoinPoint joinPoint) throws Throwable {
        Object ret;
        try {
            handleBefore(joinPoint);
            ret = joinPoint.proceed();
            handleAfter(ret);
        } finally {
            // 结束后换行
            log.info("=======End=======" + System.lineSeparator());
        }

        return ret;
    }

    private void handleAfter(Object ret) {
        // 打印出参
        log.info("Response : {}", JSON.toJSONString(ret));
    }

    private void handleBefore(ProceedingJoinPoint joinPoint) {

        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = requestAttributes.getRequest();

        //获取被增强方法上的注解对象
        SystemLog systemLog = getSystemLog(joinPoint);


        log.info("=======Start=======");
// 打印请求 URL
        log.info("URL : {}", request.getRequestURI());
// 打印描述信息
        log.info("BusinessName : {}", systemLog.businessName());
// 打印 Http method
        log.info("HTTP Method : {}", request.getMethod());
// 打印调用 controller 的全路径以及执行方法
        log.info("Class Method : {}.{}",joinPoint.getSignature().getDeclaringTypeName(),((MethodSignature) joinPoint.getSignature() ).getName());
// 打印请求的 IP
        log.info("IP : {}", request.getRemoteHost());
// 打印请求入参
        log.info("Request Args : {}", JSON.toJSONString(joinPoint.getArgs()));
    }

    private SystemLog getSystemLog(ProceedingJoinPoint joinPoint) {
        MethodSignature methodSignature= (MethodSignature) joinPoint.getSignature();
        SystemLog systemLog = methodSignature.getMethod().getAnnotation(SystemLog.class);
        return systemLog;
    }
}
